Specifications

Troubleshooting Softstart UK
Display
Possible cause/Suggested solution
Frequency
The mains frequency has gone beyond the specified range.
Check for other equipment in the area that could be affecting the mains supply,
particularly variable speed drives and switch mode power supplies (SMPS).
If the LV-DS is connected to a generator set supply, the generator may be too
small or could have a speed regulation problem.
Related parameters: 4G, 4H, 5G, 16F
Heatsink
overtemperature
Check if cooling fans are operating. If mounted in an enclosure, check if
ventilation is adequate.
Fans operate during Start, Run and for 10 minutes after the starter exits the Stop
state.
NOTE
Models LV-DS-0023B to LV-DS-0053B and LV-DS-0170B do not
have a cooling fan. Models with fans will operate the cooling fans
from a Start until 10 minutes after a Stop.
Related parameters: 16J
High Level
This is a name selected for a programmable input. See Input trip.
High Pressure
This is a name selected for a programmable input. See Input trip.
Input trip
The soft starter's programmable input is set to a trip function and has activated.
Resolve the trigger condition.
Related parameters: 4E, 5E, 5F, 6D, 6E, 16E
Instantaneous
overcurrent
There has been a sharp rise in motor current, probably caused by a locked rotor
condition (shearpin) while running. This may indicate a jammed load.
Related parameters: 4D, 5D, 16D
Internal fault X
The LV-DS has tripped on an internal fault. Contact your local supplier with the
fault code (X).
Related parameters: None
L1 phase loss
L2 phase loss
L3 phase loss
During pre-start checks the starter has detected a phase loss as indicated.
In run state, the starter has detected that the current on the affected phase has
dropped below 2% of the programmed motor FLC for more than 1 second,
indicating that either the incoming phase or connection to the motor has been
lost.
Check the supply and the input and output connections at the starter and at the
motor end.
Phase loss can also be caused by a failed SCR, particularly an SCR that has
failed open circuit. A failed SCR can only be definitely diagnosed by replacing
the SCR and checking the starter's performance.
Related parameters: None
L1-T1 shorted
L2-T2 shorted
L3-T3 shorted
During pre-start checks the starter has detected a shorted SCR or a short within
the bypass contactor as indicated. If the starter is connected in-line with the
motor, consider using PowerThrough to allow operation until the starter can be
repaired.
NOTE
PowerThrough is only available with in-line installations. If the
starter is installed inside delta, PowerThrough will not operate.
The starter will trip on Lx-Tx Shorted on the first start attempt after
control power is applied. PowerThrough will not operate if control
power is cycled between starts.
Related parameters: 15E
Low Control Volts
The LV-DS has detected a drop in the control voltage.
• Check the external control supply (terminals A4, A5, A6) and reset the
starter.
If the external control supply is stable:
• the 24 V supply on the main control PCB may be faulty; or
• the bypass driver PCB may be faulty (internally bypassed models only).
Contact your local supplier for advice.
This protection is not active in Ready state.
Related parameters: 16M
Low Level
This is a name selected for a programmable input. See Input trip.
Low Pressure
This is a name selected for a programmable input. See Input trip.
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